DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Effect of Derivative Financial Instruments on Income Statement (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Interest rate swaps | ||
| Derivative [Line Items] | ||
| Derivative financial instrument, net | $ 0 | $ 0 |
| Mortgage banking contracts | ||
| Derivative [Line Items] | ||
| Derivative financial instrument, net | 5 | (4) |
| Credit risk contracts | ||
| Derivative [Line Items] | ||
| Derivative financial instrument, net | $ 0 | $ 0 |